Rib Relays - RIBU1C, RIB2401B
What is the contact amp rating for the RIBU1C device?
10 amps
20 amps
30 amps
5 amps
What is the contact amp rating for the RIB2401B device?
10 amps
20 amps
30 amps
5 amps
A RIBU1C device is a relay
True
False
A RIB2401B device is not a relay
True
False
What is the best definition for the term "relay" as it pertains to building automation?
a damper motor
a power source
normally open
an electrical device, typically incorporating an electromagnet, which is activated by a current or signal in one circuit to open or close another circuit.
Are FS-1, SD-1, & E-Stop wired series or parallel?
Parallel
Series
Neither Series or Parallel
unknown
Which switch is shown as normally closed?
FS-1
RIB-1
E-stop
SD-1
As shown - would you expect the fan to be running or off in this configuration?
Not enough information
running
off
on/off
Which switch is shown normally open?
FS-1
SD-1
E-Stop
RIB-1
As shown, what would you assume the secondary voltage to be of the transformer?
480 vac
24 vac
series
120 vac
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